Boiler-cleaner.



Patented. 111ay21,1918.

o/zcm 23o/e lay TU Um A. SKOGLUND & i. BORE.

BOILER CLEANER.

APPucAUoN FILED Dac. n, 191s.

ALBERT SKOGLUN D .AN D JOHAN BORE, OF GOTTEN BORG, SIEDEN.

BOILER-CLEANEE.

Specication'of Letters Patent.

Patented May 2i, 1918.

Application led December 11, 1916. Serial No. 136,21'1.

To all whom z't may concern:

Be it known that we, ALBERT SKOGLUND and JOHAN BoRE, subjects of the King of Sweden, residing at Gottenborg, in the county of Gottenborg and Bohus andv Kingdom of Sweden, have invented newand useful Improvements in Boiler-Cleaners, of which the following is a specification.

This invention relates to such cleaners for the smoke tubes in steam boilers of the usual marine type, which comprise a steam lnozzle adapted to be introduced into the combustion chamber behind the smoke tube, ends so that a steam jet can be supplied into the smoke tubes and blow the soot ahead into the uptake or funnel.

The main object of this invention is to provide an adjustable cleaner of the class lnentioned adapted to be conveniently used in connection with boilers ofdifferent designs and sizes regarding the disposition of the smoke tube ends in the combustion chamber and the width of this chamber, so that the samespecimen of cleaner can easily be adjusted to effective-ly treat all the tubes in a tube bundle. The nozzles for such cleaners, as they are hitherto known, must be properly designed for every special poiler in order that thecleaner may be able o eectively blow out the soot even from the tubes which are most remote from the spot where the cleaner is fitted to the combustion chamber, the distances from this spot to the individual tubes being` in iuenced by the width and --by other dimensions of the combustion chamber. Another object of this invention is to make the cleaner adapted to remove the soot or sediyment also from the top,`bottom, and sides of the combustion chamber laterally to the tube plate. Further objects of the invention are to provide simple and reliable means for shutting oii" the steam jet, when the cleaner is to be brought out of action, and for securing the cleaner in i'ts non-acting position. Finally lone object of the invention is to provide a simple and cheap steam jet cleaner for boiler tubes which can easily ,be operated by men not specially skilled in handling mechanical tools and to make it durable against the rather severe services in a ships boiler room.

For the lirst mentioned object we provide the cleaner with a ball shaped head or nozzle which by the aid of rather simple means can be turned and secured in any arbitrary angular position relative to the longitudinal axis of the main body of the cleaner, thus dispensing with the necessity to use specially designed heads or nozzles for each individual boiler.

The second object we accomplish by providing the said adjustable head or nozzle with a lateral and secondary aperture for directing the steam jet sidewise on to the top, bottom or side walls of the combustion chamber.- Finally we obtain the last mentioned object by means of specially designed steam inlet openings cut offs and locking devices as will be clearly described and ascertained here below.

In the accompanying drawing Figure l is a longitudinal section through the improved cleaner in active position, showing portions of the boiler walls between which the cleaner is fitted, Fig. 2 is the same section but in a'decreased scale and the apparatus in its non active position. Fig. 3 is a transverse section through the steam nozzle with a portion of the ball shaped nozzle unbroken, Fig. 4 is a longitudinal section through the forward. end' portion of the apparatus with nozzle, shown in a plane 2 is longitudinally movable a tube 3 theouter or rear end of which is closed by means of a screw plug 4 and provided with a handwheel 5. The inner or forward end of the tube 3 carries a screw cap 7 embracing the rotatable, ball shaped steam nozzle 8 which can be secured in any arbitrary angular position by compressing the same between the end 9 of the tube 3 and the screw cap 7. The nozzle 8 is provided with a ,'diametrically throughgoing channel 10 as well as at the surface with an open slot 11 which slot extends throughout nearly a quarter of the circumference of the ball 8. The channel 10 is rather flat in the one direction (Figs. 3 and 4) and in the direc as clearly shown in Figs. 1 and 2. The screw cap 7 is provided with a narrow1 slot 12 in the forward end in front of the channel 10 and with a lateral aperture 13 in the boundary of the slot 11 which aperture 13 we prefer to give lengthwise a frusto-conical form with the widest end outwardly. llhe position of the slot 11 and aperture 13 relative to the steam tube 3 and the center of nozzle 8 is chosen such that the free opening for the steam jet through slot 11 and aperture 13 is not influenced by the angular alteration of the .nozzle 8.

ln the walls of the tube 3 there are provided a plurality of apertures 14 so positioned that, when the cleaner stands in working position as illustrated in Fig. 1, the apertures 14 open the entrance for the steam from the supply pipe 2 to the interior of the tube 3. When the cleaner, however, is withdrawn to the non-active position as indicated in Fig. 2, the apertures 14 have arrived outside the rear end of the casing 1, thus shutting oil the steam supply from pipe 2. To avoid steam leakage the tube 3 must be surrounded by a stuiiing box 19 with a gland 20, where it leaves ,the casing 1. Among the apertures 14 two or more are arranged in pairs diametrically opposite one another as may be seen in Fig. 1 in order that in the withdrawn position in Fig. 2 a wedge 15 -can be introduced through these two opposite apertures 14 and thus lock the tube 3 in this position against the rear end of the casing 1, by which means the cleaner is prevented from being nonintentionally thrown forward into working position. Y

To avoid a too f ar extended withdrawing of the cleaner and to limit this motion the tube 3 adjacent the inner end is provided with a. stopping annular surface 16, which in the withdrawn position coperates with a stopping annular surface 17 at the inner or front end of the spigot 18 of the easing 1, whereby the surface 16 as well as the'end surface 17 may-be conical, like a valve and its seat., in order to constitute a steamtight joint which can be tightened by pushing in the wedge 15 to any convenient extent. By this means any steam that possibly may ass by from the casing 1 along thc outside o the tube 3 will be prevented from escape into the combustion chamber 29 (Fig. 5).

The stuffing box 19 is provided with a prong 21 and a locking device 23 which is pivotablc about a fulcrum 22 and provided lwith two hook shaped prongs 24, which cooperate with an annular slot 25 in wheel hub 26, when the cleaner is in working position (Fig. 1). The last mentioned device prevents the tube 3 from being thrown rearward by reaction from the steam pressure, without interfering with the free revolving of the tube 3 by means 0f the handwheel 5.

The application of the cleaner to a boiler is carried out in the usual way, so that the l casing 1 is attached to the rear wall 27 of the boiler with the spigot 18 introduced into a tube 28 going between the wall 27 and the opposite wall 30 of the combustion chamber 29.

The cleaner works as follows: In the withdrawn position shown in Fig. 2 the steam supply to the tube 3 from pipe 2-to which the steam is supplied from the steam space in boiler by means of a pipe 6 (Fig. 5)--is shut off and the tube 3 lockedin said position by means of the wedge 15, so that the nozzle 8 is kept in the tube 28 well protected from the hot gases in the combustion chamber 29. Having removed the wedge 15 the tube 3 can be pushed ahead so far, that the nozzle 8 enters the combustion chamber 29, and that the apertures 14 establish communication between thel pipe 2 and the interior of tube 3, whereby the steam can find its way into the combustion chamber through the channel 10. The steam jet attains a spread somewhat as indicated by the full lines in Fig. 5 and acts upon the lower portion of the tube bundle 31. By turning the tube 3 around its longitudinal axis by means of the handwheel 5 the steam jet, which is laterally somewhat flattened on account of the narrow shape of channel 10 (see Figs. 3 and 4), will be caused to act successively on all the tubes in the tube bundle 31 asindicated by the dotand dash lines in Fig..5.- The slot 11 and aperture 13 (Fig. 4) servel to supply a steam jet also on to the top, bottom, and side walls in the combustion chamber as the apparatus is made to revolve by means of the handwheel thus cleaning even those parts from soot. In Fig. 5 this lateral steam jet is not illustrated.

The ball shapeof the nozzle 8 and the manner in which the nozzle is secured. to the tube 3 by the screw cap 7 allows the nozzle to be adjusted so as to get the channel 10 positioned in the most favorable angular direction relatively the middle line of the tube 3, when fitted to the boiler, by which means it will be possible to cause the ste-ain jet to edcctively reach all the smoke tubes 31. independent of in what direction to, ord

at what distance from the spot in the wall 30 where the cleaner is fitted. specimen of nozzle 8 thus can be used for boilers of any sizes and no need for a special designed nozzle for each specimen of boiler will occur,

Having thus described our said invention and how it isto be performed, what We claim as new and want to protect by Letters Patent is:

1. A boiler. cleaner comprising a steamI supply pipe, a steam tube communicating with the supply pipe and mounted for ro- `tation, means for positivelyyrotating the The saine said tube, a steam nozzle carried by thel steam tube for rotation therewith and mounted for angular adjustment with relation to the axis of the latter, and means for securing the nozzle in adjusted position.

2. A boiler cleaner comprising a steam supply pipe, a steam tube communicating with the supply pipe and mounted for rotation, means for rotating the said tube, a steam nozzle carried by the steam tube for rotation therewith and mounted Jfor angular adjustment with relation to the axis of the latter, the said nozzle having a main delivery channel adapted to be adjusted angularly by turning the nozzle, means for securing the nozzle in adjusted position, and means operable vby said nozzle for delivering a jet laterally from the nozzle in xed angular relation to the axis of the steam tlllbe irrespective of adjustment of the, nozz e,

3. A boiler cleaner comprising a steam supply pipe, a steam tube communicating with the supply pipe and mounted for rotation, means for rotating the said tube, the said tube having a spheroidal socket at its outlet end and a lateral secondary delivery opening adjacent thereto, a spheroidal steam nozzle fitting adjustably in the saidsocket and having a diametrical delivery channel which is flaring outwardly in one direction and narrow in a direction at ri htangles thereto 'so as to produce a fan-li e jet and the outlet end` ot' which is contracted medially and wider at the sides, the nozzle being provided further with a secondary delivery slot which is disposed so as to be in communication with'the interior of the steam tube and the said secondary delivery opening at all times irrespective of angular adjustment of the nozzle, and means for securing the nozzle in adjusted position.

4. A boiler cleaner comprising a steam supply pipe, a casing communicating with the supply pipe and having alining stuing boxes, a steam tube extending through the casing and fitting the stufiing boxes tor rotation and reciprocation therein, the said tube being closed at one endand having lateral apertures intermediate of its ends y adapted to establish communication between the steam supply pipe and the interior of the said tube when the latter is in its operative position, the steam tube being adapted to be withdrawn into inoperative position with thesaid apertures disposed outside the casing, a delivery nozzle provided at the open end of the steam tube, and means for operatin the said tube.

5. A oiler cleaner comprising a steam supply pipe, a casing communicating with the supply pipe and having alining stufing boxes, a steam tube extending through the casing and fitting the stufiing boxes for rotation and reciprocation therein, the said tube being closed at one end and having lateral apertures intermediate of its ends adapted -to establish communication between the steam supply pipe and the interior of the said tube when the latter is in its operative position, the steam tube being adapted to be withdrawn into inoperative position with the said apertures disposed outside the casing, a delivery nozzle provided at the open end of the steam tube, and means for operating the said tube, at least two of the apertures in the tube being arranged in transverse alinement, so that a wedge can be introduced through the two diametrically arranged apertures for the purpose of locking the cleaner in the Withdrawn position.

G. In a boiler cleaner the combination of a steam supply pipe, a steam tube communicating therewith, a steam nozzle, a delivery channel penetrating said nozzle in the longitudinal direction of the steam tube, and means for changing the angular position ot said nozzle in relation to the longitudinal axis of said tube, a casing embracing the rear portion of. said steam tube, said casing being secured to the boiler which is to be cleaned, and a hand Wheel lixed on the rear end of the steam tube adapted to make the tube revolveinside the casing, the Wheel hub being provided with an annular groove,

a pivotable locking .device on the casing, provided with prongs, which .coperate with the annular groove in the Wheel hub, for the purpose of preventing the non intentional withdrawing of the cleaner caused by the reaction of the steam, when the apparatus is in working position.

ln testimony whereof we aliix our signatures in presence of two witnesses.

ALBERT i. SKO GLUND. JOHAN BORE. Witnesses:

E. ANAUDER, C. A. LiNDBERG. 

